Ventilator



y 1933. A. s. WEINSTEIN 1,910,942

VENTILATOR Filed Oct. 10, 1929 A 6. h/ef/wfeixz Cl- F wok.

20 as water mist, from entering thereinto.

Patented May 23, 1933 UNITED STATES PATENT OFFICE A B RiAfiAM s fwni'nsrnrrr, or BRIGHTON, nAssAcnnsETrs lar relation to that type of such devices, as

are known as cowl ventilators;

5 :Among the objects of the invention are the following; it

(a). To provide a cowl ventilator having a maximum ventilating efiiciency, that is,

" To provide a ventilator havingimeans f to preventforeign undesirable matter, such (d') To provide a'ventilator soconstructed that the wind inlet thereto is of smaller area than the wind entrance so that a maximum gsuction efi'ect is attained at the wind inlet.

(e) To so construct the ventilator that the back thereof is always kept'toward the away from theWind.

back draft in that" portion of the suction is'weakest.

eral annular members composing the cowl as to create an ,air spray at thewmd nlet thereto: 1 i 1 i (h) A general disadvantage of cowl ven- --and provide a cowl Ventilator which will' operate irrespectiveof the direction in which thewind is blowing.

Other objects or the inventionvvilI be come apparent from the detailed desfip tionthereoit' given below.

5 Theseobjectshre attained by the mec'ha- This inventionrelates vto devices for the, tops of ventilating pipes, and has a part1cu- Figure 1, as seen from right to left, and

wind, and the "foul air outlet always facing (f To provide a means for preventing a the cowl where ventilator coacts. The vent pipe 1 is g "Application filed 0ctober 1 0,1929; sem No; 398,658.

nism illustrated in the of drawing, where a a igure 1 is a diagrammatic View, partly inrelevation and partly in section through the ventilator; I p

Figure 2 is, a diagrammatic showing of the shape and relative size, of the average wind entrance;

Figure 3vis a diagrammatic showing of the shapes and relative sizes ofthe wind inlets; i a t Figure 4 is a fragmentary enlargementofa portion of Figure 1, illustrating the formation of the Fair spray into the ventila toryand a i Figure 5 is a fragmentarysection similar accompanying sheet to Figure 1, illustrating a modifiedform of l the inventiony Figure 61s a fragmentary side view of particularly illustrating the back draft preventing baflie. a i i a r Similarreference numerals referto similarparts throu hout the severalviews.

In theymodication of the invention ile, lustrated in Figure 1, reference numeral 1 lndicates'the vent pipe which usually protrudes above the roof of the building or like to beventilatechand with which the erally similar to the ordinary vent pipes now a in use, with the important exception that for any specified capacity of applicants improved ventilator, the vent pipe is of much smaller diameter than the pipe used with the usualventilator of corresponding capacity. This is due to the increased capacity of applicants ventilator of any spec= ified size as compared with the capacity of the ordinaryventilatornow in general use of, corresponding size. Thus for any specified' capacity, applicant may employ a smaller size of ventilator and correspond-- ingly smaller vent pipe and still; obtain the same or greater amount ofventilation. How

thisincreased capacityis attained will. be

apparent. from the detailed description of the construction of the improveclventilator given below,

Mounted upon the vent 1, and in 7] telescoping engagement therewith, is the ventilator barrel 2, which constitutes the supporting means for the ventilator.

The ventilator may be rotatably supported upon the barrel 2 in any well known manner. The preferred supporting means (as shown in Figure 1) comprises a plurality of bracing means 3 which are adapted to house a spindle rest '41. This spindle rest is formed in the shape of a verticallyextending, somewhat elongated cup. At the bottom of the cup is disposed a glass ball 5 which acts as an antifriction vertical thrust bearing,

The spindle rest 4 is also adapted to contain a quantity of lubricant, if desired, whereby'to keep the end of the spindle 6 thoroughly lubricated. The lower endof the spindle 6 is received in thecup-shaped spindle rest and the spindle extends vertically therefrom. Between the upper end of; the bracing means 3 and the spindle 6,

antifriction bearing. means 7 may be-dis-- posed.

' The ventilator: proper 1s made up of a "plurality of frusto-coni'cal ring-shaped or annular sheet metal members of a maximum width on one side and gradually decreasing in width to a point of minimum width di ametrically opposite the point of maximum width. These annular members are indi- (rated; in Figure 1 of the drawing by reference numerals 8, 9, 10, ll, 12, 13 and 14'. An important feature of these ring-shaped members is that they'progressively increase in diameter, the lowermost member 8 being of smallest diameter while the uppermost member 14: is of greatest diameter. I

The ventilator as a. whole is substantially elbow-likein shape as a result of the dispo- 'sition of the. annular members thereotlin substantial extent of the overlap of the members,. These. spaces or wind. passages 15 are widest at the outermost or lowermost ends or portions where they constitute wind en'- trances 16. The passagesthen converge inwardly to a minimum width at the innermost or uppermost ends of the passages 15 to form wind inlets 17 to the interior or throat of the ventilator.

Extending downwardly from the member 8 and into telescopic relation to barrel 2 the ventilator rim 18. This rim member also extends upwardly into overlapped relation This leaves the re- 1 tute the wind inlets 17 with the member 8 in the same way as above described in connection with the several annular members, and as clearly illustrated.

The uppermost member 1 is shaped as shown to constitute the ventilator outlet.

The several annular members and ventilator rim are connected to each other and to the spindle 6 by a plurality of strap-like members 19 and 20.

As a consequence of the (lifl'erence in diameters of the several annular members, as above described, the ventilator may be shipped in disassembled form by placing the annular members one within the other. This is particularly advantageous in the case of large ventilators, which as a result of the novel constructiondescribed, may be shipped in a comparatively small crate, thus diminishingthe cost of crating, shipping, transporting, and handling thereof onv the job.

The top of theventilator is provided with the usual vane 21, whereby the ventilator outlet is always kept facing away from the wind.

Coming now to the peculiarand novel structural characteristics of the annular members, it is seen that the loweror outer edge of each member is flared outwardly. These flares 22 act as deflectors for the wind which is caught by the flared portions, and deflected into the interior of the ventilator. In the case of the upper. members 12 and 13. the inner sides of the flares 22 act as guides for horizontal wind currents, while the outer sides of the flares act as guides for down.- wardly directed wind currents. directed. currents are deflected inwardly by the flares 22 on members 8, 9, l0 and 11. It is thus seen that the improved; ventilator functions, irrespective of the direction otthe wind currents.

The upper or inner edge of each ot the annular members is also .flared, as-at 23. These flares or raised edges 23 extend into close proximity to the adjacent annular member and preventthe entry into the ventilator of any undesirablev foreign matter, such as water mist. The rim 18 is also formed with a flare 23. I

V Directly adjacent each raised edge the next adjacent member has formed thereon a bead or raised portion 24 in order to form a clear opening at the inner ends of the several passages 15. These clear openings consti- At the same time, the beads 24 act as stifl'eners for the annular members.

The raised edges 23 and beads 24 are so shaped as to form an air spray of the wind currents passing. through the inlets 17 As is shown in Figure 4,, the passages 15 converge from the Wind entrances to the wind inlet Openings. Wind currents entering these passages" are compressed as a result ofthis convergence and store up energy,

which is suddenly released as the currents Upwardly pand to form an air spray with a marked- .fiber ltisshaped 'to permit a free upward and outward flow of the foul air.

ly eflicient sucking effect. The course of the air or wind currents is clearly illustrated by the arrows in Figure 3 of the drawing.

The upper partof the outlet annular mem- The lowermost portion of the outlet opening is provided with a shield or baifle member 26 soshaped and placed as to prevent any possibleback .draft through the outlet opening which might attempt to take advantage of the relatively small outward wind pressure at this point.

Gounterbalance weight 27 is provided in .the rear of the ventilator so as to prevent binding of the latter in its rotation.

As a result of the construction above described, it is apparent that the diameter of the ventilator increases progressively from a minimum at the rim member 18 to a maximum at the outlet member 14. This enables the throat of the ventilator to efliciently accommodate the wind which passes therethrough in constantly increasing amount from the bottom to the top of the ventilator.

Referring now to Figure 3, it will be seen that the total area of the several wind inlets is at least double the area of the vent pipe 1. The wind entrance openings are at least twice as wide as the wind inlets, and consequently have a total area of at least four times that of the vent pipe. Thus a comparatively large volume of airenters the ventilator at the wind entrances. This vol- .ume is several times that which passes through the ventilator now in general use of corresponding size, and is the telling factor in the greater efliciency of applicants ventilator.

The modification shown in Figure 5 is of 1 the same construction as the modification above described, with the following exception. Theuppermost annular members 12 I and 13 are provided at the tops thereof with particircumferentially extending slots 28.

formed by punching out the material of the members. Disposed along one side of these 3 slots and secured to the members by soldering or welding, are substantially vertically disposed ba-file or deflector elements 29.

These deflector elements augment flared pori tions 22 of these members by guiding downwardly directed wind currents into the interior of the ventilator.

Various changes in'the form, porportions and minor details will be obvious to those skilled in the art without departing from the spirit and scope of the invention. Hence I a, consider myself entitled to all such changes as fall within the scope of the following claims.

Having thus described and illustrated the a plurality of annular members arranged in substantially vertical and overlapped relation, said members comprising a lowermost rim member, an uppermost outlet member, and a plurality of intermediate members, the uppermost of said lntermediate members beingprovided with means to deflect downwardly directed wind currents into the interior of the ventilator.

3. A cowl annulus having a passageway therethrough, means disposed adjacent said passageway and extending outwardly of said annulus and adapted to deflect air currents into said passageway, said annulus having a substantially centrally disposed bead thereon, and the inner edge of said annulus being outwardly flared.

4. In a ventilator of the class described, a plurality of substantially vertically disposed overlapping annular members of different .diameters,said members being connected together to contact only at one side thereof, whereby to form a plurality of crescentshaped openings therebetween, and theuppermost of said annular members defining the ventilator outlet, coacting means on adjacent members for introducing suddenly expanding air sprays into the interior of the ventilator irrespective of the direction of blow of the wind, the intensity of said sprays varying at different points according to the width of said openings at said points, and a baffle member disposed adjacent the narrowest part only of saidopenings where the force of said air sprays is weakest, and extending into and partially obstructing the lower portion of the ventilator outlet, whereby back draft into the ventilator is prevented.

ABRAHAM S. VVEIN STEIN 

